[alsa-devel] [PATCH 1/2] ALSA: ASoC: add STA32X codec driver

[Daniel Mack]

On Thu, Jun 16, 2011 at 10:39 AM, Lars-Peter Clausen <lars at metafoo.de> wrote:
> You can put multiple scale items each with their own min/max value into a TLV.
> For example for DRC attack in your case this would look like:
>
> static const unsigned int drc_attack_tlv[] = {
>        TLV_DB_RANGE_HEAD(3),
>        0, 7, TLV_DB_SCALE_ITEM(-3100, 200, 0),
>        8, 13, TLV_DB_SCALE_ITEM(-1600, 100, 0),
>        14, 16, TLV_DB_SCALE_ITEM(-1000, 300, 0),
> };

Using this results in strange values in userspace:

# amixer cget numid=39
numid=39,iface=MIXER,name='Limiter1 Attack Threshold (DRC Mode)'
  ; type=INTEGER,access=rw---R--,values=1,min=0,max=16,step=0
  : values=9
  | dBrange-
0x00000000,0x00000007,0x00000001,0x00000008,0xfffff3e4,0x000000c8,0x00000008,0x0000000d,0x00000001,0x00000008,0xfffff9c0,0x00000064,0x0000000e,0x00000010,0x00000001,0x00000008,0xfffffc18,0x0000012c,

Is there a way to get more descriptive information about possible
values for such controls?

Thanks,
Daniel